===================================================================
--- original.js
+++ change.js
@@ -63,12 +63,8 @@
 scoreTxt.anchor.set(0.5, 0);
 LK.gui.top.addChild(scoreTxt);
 var playerScore = 0;
 var aiScore = 0;
-var line = game.addChild(LK.getAsset('line', {
-	x: 1024,
-	y: 1366
-}));
 function updateScore() {
 	scoreTxt.setText(playerScore + ' - ' + aiScore);
 }
 game.move = function (x, y, obj) {
@@ -84,26 +80,21 @@
 	} else {
 		aiPaddle.x -= 5;
 	}
 	// Ball collision with paddles
-	var hitCount = 0;
 	if (ball.intersects(playerPaddle) || ball.intersects(aiPaddle)) {
 		ball.speedY *= -1;
-		hitCount++;
-		if (hitCount % 5 == 0) {
-			ball.speedY *= 1.2;
-			ball.speedX *= 1.2;
-		}
+		// Play MusicBG1 when tennis ball hits the racket
 		LK.getSound('MusicBG1').play();
 	}
 	// Scoring
 	if (ball.y <= 0) {
-		aiScore++;
+		playerScore++;
 		updateScore();
 		ball.x = 1024;
 		ball.y = 1366;
 	} else if (ball.y >= 2732) {
-		playerScore++;
+		aiScore++;
 		updateScore();
 		ball.x = 1024;
 		ball.y = 1366;
 	}